### **InfiniBand: Optimized for Entire Clusters** - **What it does:** InfiniBand is a networking technology that connects all the GPUs, CPUs, and storage devices in a data center. It’s designed to handle large amounts of data moving across the entire cluster of machines. - **Why it’s special:** InfiniBand combines extremely low latency and very high bandwidth (like a data center-wide NVLink). It also includes smart features, like offloading some processing work from the CPUs, so the entire system runs faster and more efficiently. Traditional Ethernet networks, while great for general computing, aren’t fast or efficient enough for the enormous data needs of AI. NVLink and InfiniBand are purpose-built to handle the “east-west” data traffic that happens between GPUs and servers in AI workloads, ensuring the system operates at peak performance without bottlenecks. In short, **NVLink is ideal for GPU-to-GPU communication**, while **InfiniBand is perfect for connecting everything across a data center**—both are essential for the high demands of modern AI and HPC.